H< >M< ID >G1 I. 



57:5 



HOMO! Ill I'M 



Homologue {hom'-o-log) \bfiAq, same; Myac, propor- 

 tion]. An homologous organ co ion to any number 



• ■I species, classes, or orders ol animals; that which 

 has the same relative structure, position, or develop- 

 ment as another. I be -.1 rgan in different organ- 

 isms under every varietj "i form and function. We may 

 have: i. Homogenetic Homologues, i.e., p 

 which, on tin- evolutionary theory, have a genetic rela- 

 tion, ., the humerus of a horse and that of an ox. 

 2. Homoplastic Homologues, i. ,■., parts 1 losely 

 similar as to relative position, but with no genetic af- 

 finity, or only a remote on. , . , the ventricle of a hat 



ami that of a bird. 



Homogenetic Serial Homo- 



logues, i.e., different pari individual, the 



correspondence between which is to be accounted lor 

 by the influence of external conditions (the "sup 

 duced segmentation " of Mr. Herbert Spencei 

 the fore-limbs and hind limbs ol one side ol anj animal. 

 4. Vertical Homologues, /... dili rrespond- 



ing parts of one individual, of which one part is dorsal, 

 the other ventral, e.g., dorsal and anal fins of certain 

 fishes. 5. Lateral Homologues, i. e. t different cor- 

 responding parts of one individual, of which one part 

 is right and the other left, e.g., the right and left arms 

 ■ •la man. 6. Antero-posterior Homologues, i. e., 

 different corresponding parts of one individual, of 

 which one part is anterior, the other posterior, e. g., 

 the mouth and the cloaca. 7. Radial Homologues, 

 i.e., different corresponding parts of one individual 

 which radiate from a central axi-, . any two arms 



on the same starfish. 8. Homotrophic Homologues, 

 /. e., parts of an individual, the correspondences be- 

 tween which are regarded as due to internal modifying 

 influences, e. g., the eyes and the ears. 9. Actinol- 

 ogous Homologues, i. e. , successive subdivisions, 

 parts, or regions of a part or segmented organ, 

 two successive joints of an antenna of a lobster, or 

 the vertebral and sternal parts of the same costal ele- 

 ment. 10. Special Homologues, i. ,-., part- of two 

 organisms belonging to the sam ial skeletal cate- 



gory, e.g., the basi-occipital of man and the cod. II. 

 General Homologues, i. e., parts of two organisms 

 belonging to the same general skeletal category, e. 

 the vertebral center of man and that of the cod, or the 

 lateral appendages of the lobster and those of the scor- 

 pion. (Mivart.) 



Homology [ho-tnoV -o-je) \_6p6Q , same ; Mjoq, proportion]. 

 The quality of being homologous ; also, the morpho- 

 logic identity of parts or organs in different animals. 

 In biology, a term introduced by R. * fwen to indicate 

 a close resemblance between pans, depending upon 

 relations of relative position. (Mivart.) 



Homomalous [ho-tnom' '-al-us\ [S/iaAor, even, level, 

 equal]. In biology, applied to parts or organs that 

 are all turned to one side. 



Homomorphism (ho-mo-mor'-fizm) \6fi6g, the same; 

 uoptyf}, form]. In biology, superficial resemblance, 

 without true homology; mimicry or adaptive resem- 

 blance. 



Homomorphous {ho-mo-mor' -fus) [<Wc, the same ; 

 fioptyfl, form]. In biology, exhibiting superficial 

 resemblance, but not truly homologous. 



Homonomous (ko-mon'-o-mus) \J>u6q, same ; vd/iog, 

 law]. Governed by or under the same law. 



Homonym Uiom' '-o-nim) [6fi6a, same; bwfia, name]. 

 That which is homonymous. 



Homonymous {Ao-mon'-im-tts) [oum\ same; bwua, 

 a name]. 1. A term applied to names that have the 

 same sound or pronounciation, but different meanings. 

 J. Coming under the same general designation 

 (thus the two external recti muscles are homony- 

 mous) ; occurring on or within the same lateral half 



of the body; not heteronomous. H. Diplopia, 



urs when the image seen by the right 

 be on ih« righl side and that seen by the lefl 1 

 to be on the left side. H. Hemianopia, vhen 



all points in the visual field of 1 lying to 



right (Right H. H.j or to the left (Left H. H. 

 the fixation point are not seen. 



Homophthalic Acid [h m-off-tkaP-ik). See Acid. 



Homophthalimid [Aom-off-thaP-im-id) [6/161 



-.'//"», '-ye ; /w/./j,' ,,II-\i >, A substance produced 

 when the- ammonium salt of homophthalic acid i- 

 heated. It crystallizes in minute needles, melting at 

 23 , 



Homophyadic [ho-mo-fi-ad' '-ik) [ouor, the same; 

 odcu, to grow]. In biology, having but one kind 

 of stem, as distinguished from 



Homophyly [ho-moff' -il-e) \_6fi6q, the sami 



race]. In biology, correspondence in genetic rela- 

 tionshi] 



Homoplasis (ko-mo-pla' '-sis) [>',un< , the same ; - 



formed]. In biology, I. an! rm foi -tructural 



agreement or modification resulting from the action of 

 identical or nearly similar forces or environments on 

 two or more parts of an organism, or on two organ 1 

 which parts are exactly or nearly alike, or perhaps 

 homogenetic. The same as the " superinduced 

 mentation " of Spencer. 



Homoplasmic [ho-mo-plaz r -mik). Same -as Homo- 

 plastic. 



Homoplasmy {ho f -mo-plaz-mi ) [6/t6g, the same ; 

 7r/ur7iHi , a thing moulded]. In biology, homoplastic 

 or homomorphic, I. e. , showing mimetic resemblances. 



Homoplast [ho , -mo-plast) \ofi6c, the same ; rr'/aaror, 

 formed, moulded]. In biology ; I. 1 Ineol any aggregate 

 orfusionof plastids. 2. An organ or part showing mere 

 superficial or mimetic resemblance to another. 



Homoplastic {ko-mo-plas / -tik) \&(i6c, the same; - 



tned]. In biology, -bowing close agreement, de- 

 pendent upon the common action of evoking cau-es 

 or moulding environment upon homogeneous parts, 

 on parts that, for other reasons, offer a likeness of 

 material to begin with. (Lankester.) 



Homoplasy (//o'-wn/^c-c) [6/ioc, the same ; 77/aair, a 

 forming, moulding]. In biology, agreement in the 

 form, structure, and perhaps function, of organs or 

 puts in the same or separate organisms, dependent 

 upon evoking causes other than genetic affinity. 



Homopterous(/;i)-/«(>/ / -/ [ r-/M \6fi6g, the same ; kt 

 wing, feather]. In biology, applied to insects having 

 wings of the same texture throughout. 



Homorgan (kurii'-or-gaji) [0/16$, the same ; bpyavov, 

 organ]. In biology, an organ resembling another ; a 

 homopl 



Homosexual (ko-mo-seks'-u-al) \_0116r, same ; s 

 sex]. Pertaining to the same sex. 



Homosexuality [ho-mo-seks-u-aP -it-e) [o«o?, same; 

 sexualis, of a sex]. That form of sexual perversion, 

 acquired or congenital, in which the individual con- 

 ceives a violent sexual passion for one -ame 

 -ex, and gratifies it either by sodomy, by titillation, or 

 platonically. 



Homosporous {ho-mos r -por-us) \bfi6c, similar: <wi 

 seed]. In biology, producing but one kind of spores ; 

 isosporous. 



Homostyled {ho 1 '-mo-stild) \0p6c, the same; or* 

 pillar]. See H us. 



Homothermic [ho-tno-ther 4 '-mik) [o//of , same ; dipur/, 

 heat]. Having uniformity of temperature or bodily 

 heat. 



Homothermous (ho-mo-thcr'-mui) \6fi6q, the same; 

 ///, heat]. In biology, applied to animals showing 

 the same degree of bodily heat. 



